1.Aluminium

2.The max/min inner bore 8mm/10mm

3.One -piece metallic coupling

4.Clamp type

5.Light weight ,extremely low inertia and high response

6.Absorption of parallel, angular misalignments and shaft end-play by spring acton;

7.Identical clockwise and anticlockwise rotational characteristics; 
 
8.Different models suitale for your different demands

9.Small batch can have a express delivery